Four US soldiers were killed and three wounded in a bomb attack in southern Afghanistan, the US military said, as American casualties mount during their bloodiest year so far in the country. The fundamentalist Taliban, whose regime was toppled in a US-led offensive in late 2001, have stepped up attacks in the run-up to legislative elections on September 18. “Four US soldiers were killed today and three were wounded in an improvised explosive device attack south of Deh Chopan” in Zabul province, a military statement said Sunday.Full Story